A 195-kilometer-long wall in northern Iran, the Gorgan Wall, was built by the Sasanian Empire in the fifth century CE, not by Alexander the Great as previously thought.
Gorgan Wall dated to Sasanian era
A 195-kilometer-long wall in northern Iran, known as the Gorgan Wall, has been definitively dated to the fifth century CE, revealing it was constructed by the Sasanian Empire rather than attributed to Alexander the Great, as previously believed. Dating methods confirm Sasanian construction
This conclusion was reached through the use of two independent dating methods—carbon 14 dating and optically stimulated luminescence—applied to bricks, ceramics, and sediments at the site. The wall, accompanied by approximately thirty forts and hydraulic systems, was likely built over several decades under the reigns of Yazdgard II and Peroz I. Earlier attribution to Alexander lacked evidence
For centuries, the Gorgan Wall was associated with Alexander the Great due to its massive scale and the lack of explicit textual evidence, leading to the nickname "Red Wall." However, this attribution lacked tangible evidence and hindered rigorous archaeological analysis. The absence of inscriptions or coins at the site contributed to the uncertainty surrounding its origins, with earlier hypotheses ranging from the Parthians to the Sasanian king Peroz I. Study confirms fifth-century construction
A study conducted between 2005 and 2009 by a team including Eberhard Sauer, Hamid Omrani Rekavandi, Tony Wilkinson, and Jebrael Nokandeh, published in Persia's Imperial Power in Late Antiquity, provided the conclusive dating. Carbon 14 dating analyzed charcoal fragments from kilns near the wall, while optically stimulated luminescence measured the time since materials were last exposed to daylight, effectively acting as an internal clock for the bricks and sediments. These methods placed the construction in the fifth century CE, with abandonment between 612 and the 650s, coinciding with the Islamic conquest of the region. Sasanian Empire had capacity for large projects
The Sasanian Empire, which ruled much of the Middle East from the early third century to the mid-seventh century, had the administrative and military capacity to undertake such a large-scale project. The construction of the Gorgan Wall and its associated infrastructure, including fortified complexes and canal systems, likely spanned several decades and involved multiple rulers. The defensive system, with its thirty forts, aimed to protect the northern borders of the empire from nomadic incursions. Gorgan Wall recognized as Sasanian engineering feat
The discovery has shifted the understanding of the wall from a legendary Alexandrian structure to a significant Sasanian engineering feat. The Gorgan Wall is now under consideration for UNESCO World Heritage List inclusion, highlighting its historical and architectural significance.
